RightNote is described as 'will help you get a grip on information overload. It is designed to be easy to use for the new-comer, but also provide advanced features once your notes start to accumulate. RightNote can store text notes, source code, spreadsheets and webpages' and is a popular Note-taking Tool in the Office & Productivity category. There are more than 100 alternatives to RightNote for a variety of platforms, including Windows, Mac, Android, iPhone and Online / Web-based. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Microsoft OneNote. Other great apps like RightNote are Google Keep (Free), Evernote (Freemium), CherryTree (Free, Open Source) and Zim (Free, Open Source).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.